Numerical Simulation And Experimental Research Of Thermal Properties On A New Compound Radiant Heating Plate Structure

Externally pressurized gas bearing has been widely used in the field of aviation,semiconductor, weave, and measurement apparatus because of its advantage of high accuracy,little friction, low heat distortion, long life-span, and no pollution. In this thesis, based on thedomestic and overseas researching……With the development of comfortable and energy-saving green buildings which ischaractered by low-carbon emission, at the same time, with the improvement of renewableenenrgy and technique and pluralism development of city energy, low temperature hot waterfloor radiant heating style which is as the comfortable and be suited to be used in low-classenergy heating is used widely.Especially under the design logos of controling indepentlytemperature and humidity and the logos of supplying cool with high temperature,supplyingheat with low temperature,radiant heating and cooling style is prominenting advantages fordevelopment while proposeing more requirements for radiant heating techniques.In this paper,a new compound radiant heating structure is proposed and the methods ofcombineing theroy with experiment is used to research the thermal properties of the newcompound radiant heating structure which has the metrits of being easy to bemaintained,being stronger pressure-bearing,being suited to be used in multiplecoverlayers.The research goal of this paper is to supply technical support for radiant heating.The experiment system is built to aim at the new compound radiant heating structurewhich is used to be as floor and wall radiant heating style.The thermal properties experimentis developed with wood floor and ceramic tile as floor heating style while with perforatehoneycomb aluminium plate and aporate honeycomb aluminium plate as wall heatingstyle.The results of temperature distribution and heat flux distribution and ratio of radiant heattransfering under different water temperatures is obtained.The physical and mathematical models is built to simulate thermal properties of newcompound radiant heating structures with Ansys software.The change laws of thermalproperties which changes with water temperature,pipe diameter,distance ofpipe,coverlayers,the thickness of special soaking insulating layer,thickness of insulating layerand thickness of aluminium are obtained,and the fitting relational expressions are offered.The experimental results is compared with simulating results which is simulated underthe experimental testing cases,and control the relative error between simulating results andexperimental results in the allowing range by collecting the simulating models.The thermalproperties of wood floor layer,ceramic layer,perforated honeycomb aluminium plate layer andoperated honeycomb aluminium plate were simulated with collected models and the dataseries are offered.Cost analysis is developed for the new compound radiant heating structure.The resultsshow the new structure not only has the properties of easy to be maintained which also to bepossessed by existing thin floor structure,but also has the advantages of high-pressure-bearingabilities,fire-proof properties,high capabilities of thermal storage and low initial cost,while can use the industiral waste to be raw matrials etc.The research results supply reference for the development of radiant heatingtechenique,and offer technical support for the usage of low-class nenergy and renewableenergy.